As filed with the Securities and Exchange Commission on January 23, 2013

Securities Act File No. 33-20827

Investment Company Act File No. 811-5518

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

x

Pre-Effective Amendment No.

o

Post-Effective Amendment No. 151

x

and

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940

x

Amendment No. 153

x

THE RBB FUND, INC.

(Exact Name of Registrant as Specified in Charter)

Bellevue Park Corporate Center

103 Bellevue Parkway

Wilmington, DE 19809

(Address of Principal Executive Offices)

Registrants Telephone Number: (302) 791-1851

Copies to:

SALVATORE FAIA

MICHAEL P. MALLOY, ESQUIRE

BNY Mellon Investment Servicing (US) Inc.

Drinker Biddle & Reath LLP

103 Bellevue Parkway

One Logan Square, Ste. 2000

Wilmington, DE 19809

Philadelphia, PA 19103-6996

(Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box)

x immediately upon filing pursuant to paragraph (b)

o on December 31, 2012 pursuant to paragraph (b)

o 60 days after filing pursuant to paragraph (a)(1)

o on December 31, 2012 pursuant to paragraph (a)(1)

o 75 days after filing pursuant to paragraph (a)(2)

o on [date] pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

o This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Title of Securities Being Registered Shares of Common Stock

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended (the 1933 Act), and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement under Rule 485 (b) under the 1933 Act and that it has duly caused this Post-Effective Amendment No. 151 to its Registration Statement to be signed on its behalf by the undersigned, thereto duly authorized, in the City of Wilmington, and State of Delaware on the 23rd day of January, 2013.

THE RBB FUND, INC.

By: /s/Salvatore Faia

Salvatore Faia

President

Pursuant to the requirements of the 1933 Act, this Post-Effective Amendment to Registrants Registration Statement has been signed below by the following persons in the capacities and on the date indicated.

SIGNATURE

TITLE

DATE

/s/Salvatore Faia

President (Principal Executive Officer) and Chief

January 23, 2013

Salvatore Faia

Compliance Officer

/s/Joel L. Weiss

Treasurer (Chief Financial Officer)

January 23, 2013

Joel L. Weiss

*J. Richard Carnall

Director

January 23, 2013

J. Richard Carnall

*Julian A. Brodsky

Director

January 23, 2013

Julian A. Brodsky

*Arnold M. Reichman

Director

January 23, 2013

Arnold M. Reichman

*Robert Sablowsky

Director

January 23, 2013

Robert Sablowsky

*Robert Straniere

Director

January 23, 2013

Robert Straniere

*Nicholas A. Giordano

Director

January 23, 2013

Nicholas A. Giordano

*Gregory P. Chandler

Director

January 23, 2013

Gregory P. Chandler

*Jay F. Nusblatt

Director

January 23, 2013

Jay F. Nusblatt

*By: /s/Salvatore Faia

January 23, 2013

Salvatore Faia

Attorney-in-Fact

THE RBB FUND, INC.

(the Company)

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Julian A. Brodsky, hereby constitutes and appoints Salvatore Faia, Michael P. Malloy, James G. Shaw and Joel L. Weiss, his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director or officer, or both, of the Company, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

DATED:

May 7, 2009

/s/ Julian A. Brodsky

Julian A. Brodsky

THE RBB FUND, INC.

(the Company)

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, J. Richard Carnall, hereby constitutes and appoints Salvatore Faia, Michael P. Malloy, James G. Shaw and Joel L. Weiss, his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director or officer, or both, of the Company, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

DATED:

May 7, 2009

/s/ J. Richard Carnall

J. Richard Carnall

THE RBB FUND, INC.

(the Company)

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Nicholas A. Giordano, hereby constitutes and appoints Salvatore Faia, Michael P. Malloy, James G. Shaw and Joel L. Weiss, his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director or officer, or both, of the Company, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

DATED:

May 7, 2009

/s/ Nicholas A. Giordano

Nicholas A. Giordano

THE RBB FUND, INC.

(the Company)

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Arnold M. Reichman, hereby constitutes and appoints Salvatore Faia, Michael P. Malloy, James G. Shaw and Joel L. Weiss, his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director or officer, or both, of the Company, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

DATED:

May 7, 2009

/s/ Arnold M. Reichman

Arnold M. Reichman

THE RBB FUND, INC.

(the Company)

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Robert Sablowsky, hereby constitutes and appoints Salvatore Faia, Michael P. Malloy, James G. Shaw and Joel L. Weiss, his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director or officer, or both, of the Company, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

DATED:

May 7, 2009

/s/ Robert Sablowsky

Robert Sablowsky

THE RBB FUND, INC.

(the Company)

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Robert Straniere, hereby constitutes and appoints Salvatore Faia, Michael P. Malloy, James G. Shaw and Joel L. Weiss, his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director or officer, or both, of the Company, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

DATED:

May 7, 2009

/s/ Robert Straniere

Robert Straniere

THE RBB FUND, INC.

(the Company)

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Gregory P. Chandler, hereby constitutes and appoints Salvatore Faia, Michael P. Malloy, James G. Shaw and Joel L. Weiss, his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director or officer, or both, of the Company, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

DATED:

October 15, 2012

/s/ Gregory P. Chandler

Gregory P. Chandler

THE RBB FUND, INC.

(the Company)

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Jay F. Nusblatt, hereby constitutes and appoints Salvatore Faia, Michael P. Malloy, James G. Shaw and Joel L. Weiss, his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director or officer, or both, of the Company, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.